CN201589808U - Striking current recording instrument - Google Patents
Striking current recording instrument Download PDFInfo
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- CN201589808U CN201589808U CN2009203171247U CN200920317124U CN201589808U CN 201589808 U CN201589808 U CN 201589808U CN 2009203171247 U CN2009203171247 U CN 2009203171247U CN 200920317124 U CN200920317124 U CN 200920317124U CN 201589808 U CN201589808 U CN 201589808U
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Abstract
The utility model relates to a device for measuring the transient heavy current of thunderbolt, in particular to a striking current recording instrument. The striking current recording instrument mainly solves the technical problems in the prior art that a standard resistor directly connected in series in a tested circuit requires special materials, leads to high price and causes troubles to the measurement; and under adoption of the Rogowski coil, lightning current amplitude needs to be recorded on a magcard and then is read out by a special card reader, thereby being not visualized and being troublesome. The striking current recording instrument comprises a shell, wherein the outer surface of the shell is provided with an output socket, the Rogowski coil communicated with the output socket is arranged in the shell, the middle of the Rogowski coil is hollow and provided with an inner bore, the Rogowski coil is connected with a self-integral resistor by a wire, the self-integral resistor is connected with a high-speed sampling hold circuit by another wire, the high-speed sampling hold circuit is respectively connected with an analog-to-digital (A/D) converter or/and a singlechip, and the A/D converter or/and the singlechip is/are respectively connected with a digital panel and a displayer.
Description
Technical field
The utility model relates to a kind of device of measuring the big electric current of thunder and lightning transient state, especially relates to the isostructural improvement of a kind of impact galvo-recorder.
Background technology
In lightning-protection system, flow through the amplitude of the lightning current of surge protector when needing sometimes to monitor, write down thunderbolt; At thunder and lightning surge tester,, in the exploitation of 10/700 μ s and 10/350 μ s waveform generator, production, the test, also need to detect the cranking test equipment of the amplitude and the waveform parameter of dash current as 8/20 μ s.The characteristics of this measurement mechanism are that the linearity is good, antijamming capability is strong, response speed is fast, wide frequency range, dynamic range are big.As everyone knows, dash current is the very big transient wave of current changing rate (di/dt) as 8/20 μ s current wave, is acyclic single current impulse, can not measure with power current current transformer commonly used.In the past, the amplitude of dash current and the measurement of waveform parameter, the most frequently used is low ohm measuring resistance (0.1～10m Ω), cooperates digital oscilloscope to measure again.This measuring method directly seals in calibration resistor in the tested loop, under heavy current impact, can produce heat and stress effect, and resistance is easy to generate variation, use special material, cost an arm and a leg, and resistance seals in circuit-under-test and makes troubles to measurement.Another kind method is to use Luo-coil, and amplitude of lightning current is recorded on the magnetic card, reads with the card reader of specialty again.Very intuitively not pretty troublesome yet.Chinese patent discloses a kind of lightning arrester dash current score value action record device (Granted publication number: CN 2526856Y), it comprises at least two dash current counting devices that starting current arranged side by side or in parallel is different, the starting current of each dash current counting device increases step by step, dash current counting device comprises inductive coil CT, current-limiting resistance R, rectifier D, capacitor C and operation counter PC, wherein, two or more dash current arranged side by side counting devices use independently inductive coil CT respectively, its circuit connecting relation is: inductive coil CT is connected with rectifier D with current-limiting resistance R series connection back, and the output terminal of rectifier D is connected with operation counter PC with filter capacitor C; Two or more dash currents in parallel counting devices then can a shared inductive coil CT, its circuit connecting relation mainly be with current-limiting resistance R by respectively with separately independently inductive coil CT be connected to change into all and be connected with same inductive coil CT.This method will be used at least two dash current pen recorders arranged side by side or in parallel, owing to circuit complexity, cost of manufacture height, is not suitable for the complete machine general design requirement and cooperates digital oscilloscope to measure again.Chinese patent discloses a kind of lightning arrester dash current score value action record device (Granted publication number: CN 2526856Y), it comprises at least two dash current counting devices that starting current arranged side by side or in parallel is different, the starting current of each dash current counting device increases step by step, dash current counting device comprises inductive coil CT, current-limiting resistance R, rectifier D, capacitor C and operation counter PC, wherein, two or more dash current arranged side by side counting devices use independently inductive coil CT respectively, its circuit connecting relation is: inductive coil CT is connected with rectifier D with current-limiting resistance R series connection back, and the output terminal of rectifier D is connected with operation counter PC with filter capacitor C; Two or more dash currents in parallel counting devices then can a shared inductive coil CT, its circuit connecting relation mainly be with current-limiting resistance R by respectively with separately independently inductive coil CT be connected to change into all and be connected with same inductive coil CT.This measuring method directly seals in calibration resistor in the tested loop, under heavy current impact, can produce heat and stress effect, and resistance is easy to generate variation, use special material, cost an arm and a leg, and resistance seals in circuit-under-test and makes troubles to measurement.Another kind method is to use Luo-coil, and amplitude of lightning current is recorded on the magnetic card, reads with the card reader of specialty again.Very intuitively not pretty troublesome yet.
The utility model content
The utility model technical issues that need to address provide a kind of dash current registering instrument, it mainly is to solve existing in prior technology as directly sealing in the tested loop with calibration resistor, will use special material, cost an arm and a leg, and resistance seals in the problem that circuit-under-test makes troubles to measurement; If the employing Luo-coil then needs amplitude of lightning current is recorded on the magnetic card, read with the card reader of specialty again, intuitively not pretty troublesome yet, if adopt the method for existing patent,, be not suitable for the technical matters of general design requirement etc. then because circuit complexity, cost of manufacture height.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals:
Dash current registering instrument of the present utility model, comprise housing, the outside surface that it is characterized in that described housing is provided with accessory power outlet, the inside of housing is provided with the Luo-coil that is communicated with accessory power outlet, Luo-coil middle part is hollow and be provided with endoporus, Luo-coil is connected with from integrating resistor by circuit, be connected with the high-speed sampling holding circuit from integrating resistor by circuit, respectively the connection mode number converter is or/and single-chip microcomputer for the high-speed sampling holding circuit, and analog to digital converter connects the amplitude that digitizing tablet shows dash current.Single-chip microcomputer output connects LCD, shows the data that institute writes down and preserves.Sieve third constellations coil can be installed BNC socket and be connected with digital oscilloscope with 75 Ω cables, 75 Ω cables, one termination sieve third constellations coil, the BNC accessory power outlet of another termination T type, three interfaces are wherein arranged, the cloudy socket of the BNC at two, one connects 75 Ω loads, another cloudy socket connects 75 Ω cables, middle BNC public plug connects the oscillograph input and is connected with the first high-speed sampling holding circuit from integrating resistor by circuit, respectively the connection mode number converter is or/and single-chip microcomputer for the high-speed sampling holding circuit, and analog to digital converter, single-chip microcomputer connect digitizing tablet, the second high-speed sampling holding circuit respectively.Accessory power outlet is the BNC accessory power outlet of T type, and it has three interfaces.Luo-coil adopts hollow coil, prevents magnetic saturation, improves the linearity and survey frequency scope.The endoporus of Luo-coil can be worn heavy gauge wire, and heavy gauge wire connects and mixes the positive and negative output terminal that the ripple thunder and lightning gushes tester then.Adopt Luo-coil as sensor, utilize electromagnetic induction principle and from integrating circuit; Adopt high-speed sampling holding circuit and analog to digital converter, the amplitude of dash current directly is presented on the digitizing tablet, or makees memory circuit, in lightning-protection system with single-chip microcomputer, the time keeping of the amplitude of each thunder-strike current and generation and preservation are got up, so that check.
As preferably, described housing is an aluminum alloy casing.Aluminum alloy casing can prevent extraneous interference.
As preferably, described accessory power outlet is connected with digital oscilloscope by 75 valgar malen the Lushui River mosquito type heads, can show the waveform of dash current.
As preferably, the secondary sampling hold circuit that described high-speed sampling holding circuit is made up of three operational amplifiers is formed.As preferably, be connected with digital oscilloscope on the described accessory power outlet, can show the waveform of dash current.
As preferably, the secondary sampling hold circuit that the described first high-speed sampling holding circuit, the second high-speed sampling holding circuit are made up of three operational amplifiers is formed.Three grades of amplifiers adopt the amplifier of high input impedance and are connected into follower, further improve input impedance, help the high impedance that level keeps and imports.
Therefore, the utlity model has and use digital oscilloscope, can measure the amplitude, rise time, half-peak value time of current wave and reverse parameter such as overshoot exactly, characteristics such as simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is structural representations of the utility model housing;
Accompanying drawing 3 is structural representations of the utility model Luo-coil;
Accompanying drawing 4 is sieve third constellations coil dash current sensor equivalent circuit structure synoptic diagram;
Accompanying drawing 5 is high-speed sampling holding circuit structural representations.
Parts, position and numbering among the figure: accessory power outlet 1, Luo-coil 2, endoporus 3, from integrating resistor 4, high-speed sampling holding circuit 5, analog to digital converter 6, single-chip microcomputer 7, digitizing tablet 8, display 9, aluminum alloy casing 10, digital oscilloscope 11.
Accompanying drawing 5 is first, second high-speed sampling holding circuit structural representations.
Parts, position and numbering among the figure: accessory power outlet 1, Luo-coil 2, endoporus 3, from integrating resistor 4, the first high-speed sampling holding circuit 5, analog to digital converter 6, single-chip microcomputer 7, digitizing tablet 8, the second high-speed sampling holding circuit 9, aluminum alloy casing 10, digital oscilloscope 11.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the dash current registering instrument that this is routine as Fig. 2, has an aluminum alloy casing 11, be fixed with an accessory power outlet 1 on the aluminum alloy casing, the inside of aluminum alloy casing is provided with the Luo-coil 2 that is communicated with accessory power outlet, and as Fig. 3, Luo-coil middle part is hollow and be provided with endoporus 3.As Fig. 1, Luo-coil is connected with from integrating resistor 4 by circuit, is connected with high-speed sampling holding circuit 5 from integrating resistor by circuit, and the high-speed sampling holding circuit is connection mode number converter 6, single-chip microcomputer 7 respectively; Analog to digital converter, single-chip microcomputer connect digitizing tablet 8, liquid crystal display-display 9 respectively.High-speed sampling holding circuit embodiment: the dash current registering instrument that this is routine, as Fig. 2, an aluminum alloy casing 10 is arranged, be fixed with an accessory power outlet 1 on the aluminum alloy casing, the inside of aluminum alloy casing is provided with the Luo-coil 2 that is communicated with accessory power outlet, as Fig. 3, Luo-coil middle part is hollow and be provided with endoporus 3.As Fig. 1, Luo-coil is connected with from integrating resistor 4 by circuit, be connected with the first high-speed sampling holding circuit 5 from integrating resistor by circuit, the high-speed sampling holding circuit is connection mode number converter 6, single-chip microcomputer 7 respectively, and analog to digital converter, single-chip microcomputer connect digitizing tablet 8, the second high-speed sampling holding circuit 9 respectively.The secondary sampling hold circuit that the first high-speed sampling holding circuit 5, the second high-speed sampling holding circuit 9 are made up of three operational amplifiers is formed, as Fig. 5, first order sampling hold circuit, charging rate is very little, capacitor C 1 charging reaches the input pulse peak value very soon, and discharge time constant is very big, and it is very slow to discharge, and voltage is kept on the electric capacity; Charging capacitor C2 is bigger than C1 in the second level, makes the retention time longer.Also be connected with digital oscilloscope 11 on the accessory power outlet 1 of aluminum alloy casing.
During concrete the use, heavy gauge wire with long a 20～30cm passes sieve third constellations coil endoporus 3, connect then and mix the positive and negative output terminal that the ripple thunder and lightning gushes tester, accessory power outlet 1 with 75 Ω concentric cable, one termination Luo-coil 2, the cloudy socket of a BNC at the two ends of one termination T type accessory power outlet, the cloudy socket of another BNC of T type accessory power outlet connects 75 Ω loads, the BNC public plug of the centre of T type accessory power outlet connects oscillograph input BNC socket, every impact takes place once when mixing billow, digital oscilloscope shows one time 8/20 μ s impulse current waveform.As shown in Figure 4, flow through current i when tested current
1The time, by Luo-coil with in the loop that integrating resistor R forms, induction current i will be arranged
2Produce, producing induced voltage on R is Um.According to the electromagnetic induction principle i that can derive
1=n/R * Um, n is the number of turn of Luo-coil in the formula, and R is an integrating resistor, and n is big more, and R is more little, and the sensitivity of coil is just high more, can find out Um and current i from formula
1Be directly proportional waveform similarity.As long as survey induced voltage Um just can survey dash current amplitude and waveform in the current.
Claims (4)
1. dash current registering instrument, comprise housing, the outside surface that it is characterized in that described housing is provided with accessory power outlet (1), the inside of housing is provided with the Luo-coil (2) that is communicated with accessory power outlet, Luo-coil middle part is hollow and be provided with endoporus (3), Luo-coil is connected with from integrating resistor (4) by circuit, be connected with high-speed sampling holding circuit (5) from integrating resistor by circuit, respectively connection mode number converter (6) is or/and single-chip microcomputer (7) for the high-speed sampling holding circuit, and analog to digital converter, single-chip microcomputer connect digitizing tablet (8), display (9) respectively.
2. dash current registering instrument according to claim 1 is characterized in that described housing is aluminum alloy casing (10).
3. dash current registering instrument according to claim 1 and 2 is characterized in that described accessory power outlet (1) upward is connected with digital oscilloscope (11) by cable and T connector.
4. dash current registering instrument according to claim 1 and 2 is characterized in that the secondary sampling hold circuit that described high-speed sampling holding circuit (5) is made up of three operational amplifiers forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203171247U CN201589808U (en) | 2009-12-11 | 2009-12-11 | Striking current recording instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203171247U CN201589808U (en) | 2009-12-11 | 2009-12-11 | Striking current recording instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201589808U true CN201589808U (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203171247U Expired - Fee Related CN201589808U (en) | 2009-12-11 | 2009-12-11 | Striking current recording instrument |
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| CN (1) | CN201589808U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436897A (en) * | 2011-09-15 | 2012-05-02 | 西安交通大学 | Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same |
| CN102508126A (en) * | 2011-10-20 | 2012-06-20 | 中国航天科技集团公司第五研究院第五一〇研究所 | On-orbit monitoring device for static discharge pulse coupling effect |
| CN103033665A (en) * | 2011-09-30 | 2013-04-10 | 株式会社山光社 | Lightning surge detector, surge protective device, and management system for surge protective device |
| CN105305594A (en) * | 2015-11-18 | 2016-02-03 | 深圳供电局有限公司 | Circuit used for acquiring bus current and station electricity emergency automatic switching device |
| CN107768904A (en) * | 2017-10-26 | 2018-03-06 | 国网宁夏电力公司检修公司 | Plug-in Rogowski coil device |
| US10650296B2 (en) | 2018-02-13 | 2020-05-12 | Erico International Corporation | Mobile card reader for lightning protection systems |
| CN111208752A (en) * | 2018-11-21 | 2020-05-29 | 伊顿智能动力有限公司 | Single input circuit for receiving output from di/dt sensor or current transformer and circuit breaker including the same |
| CN112230042A (en) * | 2020-12-11 | 2021-01-15 | 南京汇宁桀信息科技有限公司 | Impulse current detection circuit |
| CN112557732A (en) * | 2020-11-12 | 2021-03-26 | 中国电力科学研究院有限公司 | Magnitude tracing method and system of impulse current measuring device based on induction coil |
| TWI726346B (en) * | 2019-07-03 | 2021-05-01 | 國立虎尾科技大學 | Electrical discharge circuit and system for surgical instruments |
| CN113520521A (en) * | 2021-08-30 | 2021-10-22 | 江苏朴芃医疗科技有限公司 | Current peak value detection device, high voltage generator and vascular calcification treatment equipment |
-
2009
- 2009-12-11 CN CN2009203171247U patent/CN201589808U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436897A (en) * | 2011-09-15 | 2012-05-02 | 西安交通大学 | Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same |
| CN102436897B (en) * | 2011-09-15 | 2014-01-29 | 西安交通大学 | Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same |
| CN103033665A (en) * | 2011-09-30 | 2013-04-10 | 株式会社山光社 | Lightning surge detector, surge protective device, and management system for surge protective device |
| CN103033665B (en) * | 2011-09-30 | 2017-04-26 | 株式会社山光社 | Lightning surge detector, surge protective device, and management system for surge protective device |
| CN102508126A (en) * | 2011-10-20 | 2012-06-20 | 中国航天科技集团公司第五研究院第五一〇研究所 | On-orbit monitoring device for static discharge pulse coupling effect |
| CN105305594A (en) * | 2015-11-18 | 2016-02-03 | 深圳供电局有限公司 | Circuit used for acquiring bus current and station electricity emergency automatic switching device |
| CN107768904A (en) * | 2017-10-26 | 2018-03-06 | 国网宁夏电力公司检修公司 | Plug-in Rogowski coil device |
| US11030503B2 (en) | 2018-02-13 | 2021-06-08 | Erico International Corporation | Mobile card reader for lightning protection systems |
| US10650296B2 (en) | 2018-02-13 | 2020-05-12 | Erico International Corporation | Mobile card reader for lightning protection systems |
| CN111208752A (en) * | 2018-11-21 | 2020-05-29 | 伊顿智能动力有限公司 | Single input circuit for receiving output from di/dt sensor or current transformer and circuit breaker including the same |
| CN111208752B (en) * | 2018-11-21 | 2024-01-16 | 伊顿智能动力有限公司 | Single input circuit for receiving output from di/dt sensor or current transformer and circuit breaker comprising same |
| TWI726346B (en) * | 2019-07-03 | 2021-05-01 | 國立虎尾科技大學 | Electrical discharge circuit and system for surgical instruments |
| CN112557732A (en) * | 2020-11-12 | 2021-03-26 | 中国电力科学研究院有限公司 | Magnitude tracing method and system of impulse current measuring device based on induction coil |
| CN112557732B (en) * | 2020-11-12 | 2023-09-19 | 中国电力科学研究院有限公司 | Magnitude tracing method and system of impulse current measuring device based on induction coil |
| CN112230042A (en) * | 2020-12-11 | 2021-01-15 | 南京汇宁桀信息科技有限公司 | Impulse current detection circuit |
| CN113520521A (en) * | 2021-08-30 | 2021-10-22 | 江苏朴芃医疗科技有限公司 | Current peak value detection device, high voltage generator and vascular calcification treatment equipment |
| CN113520521B (en) * | 2021-08-30 | 2023-11-03 | 江苏朴芃医疗科技有限公司 | Current peak detection device, high-voltage generator and vascular calcification treatment equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20111211 |